YTP-100 YTP-150 diaphragm pressure gauge

Diaphragm series pressure gauges (with chemical seals) are made from a different type of universal pressure gauge with a diaphragm isolator. Connecting bodies with specific requirements can also be fitted between the universal pressure gauge and the diaphragm spacer. Through this connection, the general-purpose pressure gauge, increase the measurement performance of special corrosion requirements, high temperature, viscosity or containing solid plankton, easy to solidify medium pressure measurement performance. Diaphragm pressure gauge (with chemical seal) is widely used in the petrochemical industry, alkali, chemical fiber, pharmaceutical, iron and steel, food and other industries to measure fluid media pressure.
Structure principle
Working principle of the chemical seal series pressure gauge as shown in the figure, the isolation diaphragm under the action of the measured medium pressure P to produce deformation, compression internal filling of the working fluid to form a pressure equivalent to P pressure P '. Through the conduction of the working fluid, the free end of the elastic element in the pressure instrument to produce corresponding deformation, and according to the working principle of the pressure instrument that is measured.
Liquid level difference of seal fluid of diaphragm pressure gauge
When the pressure part of the pressure gauge and the general-purpose pressure gauge are in different positions during installation, the influence of the liquid level difference on the pressure should be considered (especially for the diaphragm meter connected by hose). as shown in Fig. (If the specific gravity of the sealing working fluid is substantially equal to 1, the pressure difference of 1m drop is about 0.01MPa.)
Effect of temperature on diaphragm pressure gauge
The influence of diaphragm pressure gauge's temperature is related to the expansion coefficient of sealing liquid and the diaphragm stiffness and the temperature of the pressure part. When the temperature of the instrument deviates from 20+5 ℃, the maximum change rate of the indication value affected by the temperature is not more than 0.1%/℃, and the flexibility (far-connected type) is not more than 0.1+0.025L%/℃(L-transfer tube length m). Diaphragm pressure gauges should pay attention to according to different use environments, choose suitable sealing fluid.

Corrosion Resistance of Diaphragm Pressure Gauge
The corrosion resistance of the diaphragm pressure gauge manufactured by our company includes fully meeting the external environment of the customer and the internal environment (medium corrosion resistance). According to the requirements of the external environment, we can choose different types of pressure gauges produced by our company and the corresponding isolators for matching. For different corrosive measuring media, it can be ensured by selecting the corresponding anti-corrosion material diaphragm and anti-corrosion material isolation body parts.

1.Diaphragm materialSUS316, SUS316L, Monel (Cu30Ni70), Hastelloy (HC276), tantalum (Ta), fluoroplastic (F4), titanium diaphragm, etc.
2.Separator Material1 Cr18Ni9Ti, SUS316, SUS316L, titanium, fluoroplastic (F4), stainless steel external spraying or lining fluoroplastic or other suitable materials 3. sealing gasket material: nitrile rubber, fluorine rubber, silicone rubber and fluoroplastic